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Finding the Fourth Proportional to 268.22, 370.18 and 151.78

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Solution

The fourth proportional to 268.22, 370.18 and 151.78 is: 209.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.22 : 370.18 = 151.78 : x
  2. Step 2: Convert to fraction form
    268.22/370.18 = 151.78/x
  3. Step 3: Cross multiply
    268.22x = 370.18 × 151.78
  4. Step 4: Simplify right side
    268.22x = 56,185.92
  5. Step 5: Solve for x
    x = 56,185.92/268.22
  6. Step 6: Final answer
    x = 209.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.